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Finding the Fourth Proportional to 91,181.60, 136,758.72 and 28,844

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Solution

The fourth proportional to 91,181.60, 136,758.72 and 28,844 is: 43,261.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,181.60 : 136,758.72 = 28,844 : x
  2. Step 2: Convert to fraction form
    91,181.60/136,758.72 = 28,844/x
  3. Step 3: Cross multiply
    91,181.60x = 136,758.72 × 28,844
  4. Step 4: Simplify right side
    91,181.60x = 3,944,668,519.68
  5. Step 5: Solve for x
    x = 3,944,668,519.68/91,181.60
  6. Step 6: Final answer
    x = 43,261.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.